US4219199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamond with molybdenum bonded thereto
Assignee: Individual
•
Filing: 1977-11-02
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Granted: 1980-08-26
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Expires: 1997-11-02
Abstract
Abstract A diamond with molybdenum bonded or linked thereto comprises a diamond structure subjected to a pre-sputtering process by causing gaseous ions to impinge on a selected portion of its surface, and molybdenum bonded to said diamond structure, which has been subjected to said pre-sputtering process, by a sputtering process, forming a molybdenum film of 10 to 50 A in thickness bonded or linked with the diamond and which cannot be dissolved with hydrogen peroxide. The diamond may be in the shape of a record stylus which has been soldered to a stylus holder by coating the molybdenum film with copper, or other metal suitable for cementing by solder.
Inventors
- 👤 Kazumi Okuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:42
CPC Classifications
B; B28; B28D; B28D5/00; A; A44; A44C; A44C17/00; C; C30; C30B; C30B29/00; C30B29/02; C30B29/04; C30B33/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
33 words
A diamond having an exposed molybdenum film of about 10 to 50 A in thickness bonded to at least a portion of its surface, said film incapable of being dissolved by hydrogen peroxide.
Claim 2
Dependent Claim
33 words
A diamond having an exposed molybdenum film of about 10 to 50 A in thickness bonded to at least a portion of its surface, said film incapable of being dissolved by hydrogen peroxide.
Claim 3
Dependent Claim
13 words
A diamond according to claim 1 wherein said film has a predetermined pattern.
Claim 4
Dependent Claim
24 words
A diamond according to claim 2 wherein said diamond is a gem and said pattern indicates the result of appraisal of said diamond gem.
Claim 5
Dependent Claim
116 words
A diamond having a molybdenum film bonded to at least a portion of its surface, said film being formed by subjecting said diamond surface to a pre-sputtering process wherein gaseous ions impinge thereon thereby activating said surface; by applying molybdenum to said activated surface by sputter coating, to form a coating consisting of a film of molybdenum about 10 to 50 A in thickness bonded to the surface of the diamond and, superimposed thereon, a layer of unbonded molybdenum; and by cleaning said coating with sufficient hydrogen peroxide to remove the layer of unbonded molybdenum whereby the undissolved bonded film of molybdenum about 10 to 50 A in thickness remains on the surface of the diamond.
Claim 6
Dependent Claim
116 words
A diamond having a molybdenum film bonded to at least a portion of its surface, said film being formed by subjecting said diamond surface to a pre-sputtering process wherein gaseous ions impinge thereon thereby activating said surface; by applying molybdenum to said activated surface by sputter coating, to form a coating consisting of a film of molybdenum about 10 to 50 A in thickness bonded to the surface of the diamond and, superimposed thereon, a layer of unbonded molybdenum; and by cleaning said coating with sufficient hydrogen peroxide to remove the layer of unbonded molybdenum whereby the undissolved bonded film of molybdenum about 10 to 50 A in thickness remains on the surface of the diamond.
Claim 7
Dependent Claim
45 words
A diamond according to claim 10 wherein at least a portion of the surface of the diamond is covered with a photoresist prior to the pre-sputtering process so that the molybdenum coating forms on only a predetermined part of said surface in a predetermined pattern.
Claim 8
Dependent Claim
24 words
A diamond according to claim 5 wherein said diamond is a gem and said pattern indicates the result of appraisal of said diamond gem.
Claim 9
Dependent Claim
76 words
A diamond according to claim 4 which has the shape of a stylus for reproducing a record disc and wherein the undissolved bonded film of molybdenum is formed on the upper end of said stylus, said film is coated by sputtering with a layer of a metal other than molybdenum suitable for cementing by solder to a stylus holding member, and said metal layer is cemented to said stylus holding member by means of said solder.
Claim 10
Dependent Claim
104 words
A diamond particle having a molybdenum film of about 10 to 50 A in thickness bonded to at least a portion of its surface, said film incapable of being dissolved by hydrogen peroxide, said article having the shape of a stylus for reproducing a record disc and having the bonded film of molybdenum on the upper end of said stylus, said film having a layer of a metal other than molybdenum adhering directly to its surface, said metal being suitable for cementing by solder to a stylus holding member, and a stylus holding member cemented to said metal layer by means of said solder.
Claim 11
Dependent Claim
104 words
A diamond particle having a molybdenum film of about 10 to 50 A in thickness bonded to at least a portion of its surface, said film incapable of being dissolved by hydrogen peroxide, said article having the shape of a stylus for reproducing a record disc and having the bonded film of molybdenum on the upper end of said stylus, said film having a layer of a metal other than molybdenum adhering directly to its surface, said metal being suitable for cementing by solder to a stylus holding member, and a stylus holding member cemented to said metal layer by means of said solder.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |